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Fan clutch

Discussion in '40- & 55-Series Tech' started by Fireman, Aug 4, 2005.

  1. Fireman

    Fireman SILVER Star

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    How tight should a fan clutch tighten up when it gets hot? Put a new one on my Pig (SBC) and let it get up to 220 deg and it felt just like it did when it was cool. You could turn it fairly easily. Do they make different ones that ar activated at different temps? The one on my diesel come on at 210 and you can hear/feel the difference. Thanks! :flamingo: :beer:
     
  2. brian

    brian SILVER Star

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    it should lock up enough to spin the fan, don't think in fact pretty sure is not a 100% lock up but you should be able to feel the difference and you WILL be able to hear when(if) it engages.
     
  3. bustanutley

    bustanutley

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    mine is definitely loud when it kicks on.
     
  4. 65swb45

    65swb45 Supporting Vendor

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    Back when I used to get my K5 serviced at a local shop, the mechanic there told me he'd sworn off ALL aftermarket fan clutches because of weak engagement issues that ended up biting him in the butt on come-back jobs. I remember him telling me what a genuine GM clutch went for and I just opted for a clutch converter to run my stock fan direct drive.

    Mark W has said basically the same thing about the Toyota clutches, and I agree with him on those.

    :)